"""
特征提取模块

该模块实现了时域和频域特征提取，包括：
- 时域特征：振幅、能量、过零率、RMS、峰峰值
- 频域特征：功率谱密度、谱质心、谱滚降、谱带宽、MFCC
"""

from .time_domain_features import TimeDomainFeatures
from .frequency_domain_features import FrequencyDomainFeatures
from .feature_extractor import FeatureExtractor

__all__ = [
    'TimeDomainFeatures',
    'FrequencyDomainFeatures',
    'FeatureExtractor'
] 